Home / 120,540.72-180,790.41-31,795.11

Finding the Fourth Proportional to 120,540.72, 180,790.41 and 31,795.11

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Solution

The fourth proportional to 120,540.72, 180,790.41 and 31,795.11 is: 47,687.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,540.72 : 180,790.41 = 31,795.11 : x
  2. Step 2: Convert to fraction form
    120,540.72/180,790.41 = 31,795.11/x
  3. Step 3: Cross multiply
    120,540.72x = 180,790.41 × 31,795.11
  4. Step 4: Simplify right side
    120,540.72x = 5,748,250,972.90
  5. Step 5: Solve for x
    x = 5,748,250,972.90/120,540.72
  6. Step 6: Final answer
    x = 47,687.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.